nonmaterial vs immaterial

nonmaterial and immaterial both are adjectives.

Word	Noun	Adjective	Verb	Adverb
nonmaterial	No	Yes	No	No
immaterial	No	Yes	No	No

As adjectives, nonmaterial and immaterial are synonyms defined as:

nonmaterial (adjective)	immaterial (adjective)
not consisting of matter	not consisting of matter
	of no importance or relevance especially to a law case
	without material form or substance
	not pertinent to the matter under consideration
	(often followed by `to') lacking importance; not mattering one way or the other